North Korean Twitter account hacked

North Korean army officers punch the air as they chant slogans during a rally. Photo / AP

As North Korea threatens nuclear strikes on America, it appears the hermit kingdom has fallen victim to cyber warfare.

A message was posted from the nation's official Twitter account just before 5pm on Thursday (AEST), simply saying "hacked".

A link was provided with the tweet which led to an internet page with North Korea's flag and a Guy Fawkes-style mask - synonymous with the Anonymous hacking movement.A second tweet said "tango down", the code word often used by Anonymous to signify it has carried out the hack.

AAP could not immediately verify if Anonymous was behind the attack.

North Korea's Twitter account @uriminzok, which translates as "our nation", has been operating for a number of years and is believed to be used largely for propaganda purposes.

It has more than 13,000 followers but follows just three people, including US man Jimmy Dushku.

In recent interviews Mr Dushku said he had no idea why North Korea was following him, and it appears as though he may have been selected randomly.